该方法在比赛区域建立二维平面坐标系，将整个航程划分若干区段，通过坐标轴旋转和平移得到各区段的虚拟坐标系。
A two-dimensional model for sailing was used to divide the voyage into several sections and obtain a corresponding coordinate system by a circumvolving and shifting operation.
他是从丙级联赛南方赛区的沃尔索尔队转会来的，为阿森纳在244场比赛中打入137球，进球率高于每两场比赛一球。
Bought from Walsall in the Third Division (South) he bagged an incredible 137 goals in 244 games for the Gunners, a scoring rate of more than a goal every other game.
参赛者在指定的比赛区域中必须保持安静。
Competitors must remain quiet when inside the designated competition area.
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